Folding rule.



UNITED- STATES PATENT* oFFIoE..

JusTiis A. Tia-AUT. or NEW BRITAiN, CONNECTICUT, AssIG'NoR To STANLEY RULE4 & LEVEL COMPANY, OF NEW RATIoN or coNNEcTioUT.

BRITAIN, ooNNEoTicunA Conro- FOLDING RULE.

v 'Specification of Letters Patent.

Patented .my s1, moc:

1906. Serial lilo. 310,465.

Application filed A pril 7.

same,) have invented certain new and useful Improvements in Folding Rules, of which the following., is a full, clear, tion.

`My invention relates to measuring-rules, and particularly 'to a joint for folding rules.

The object is to provide-a joint having greater durability and which will prevent chang of the members of' the rule oneupon another. W 4

-The accompanying single sheet -of draw-` in s illustrates the invention in detail.'

` igure 1 is a plan `view of a rulefolded up. Fig. 2 is a side view of same. 1i`ig'. 3 is a cross-sectional opened out. Fig. 5 .is a detail view o the parts of the pivot member. Fig. lshows a plan and side view of the ivottension-spring.

The rule' is made up o a plurality of members, as 1 2 3 4 5 6, pivoted together and In a chamber 11, formed by the recess back of-boss 9 and by a cavity in the under is set in a recess in located a spring12, havside of member 2, is by a mg acentral perforation surrounded shoulder 13.

' The ivot-stud 14 has a shank whichpasses throug spring 12, (plates 9 and 10, and mem-l ber 3 and is rive .on the washer 15, which member 3. The integral Hartford, State of Connecticut, (whose post-office ,address is the and exact ldescripn view showing two joints. Fig.l 5 4 is a longitudinal sectional view of one 'o1nt.

-rated and chaiing of the members upon each other is prevented, the roundedl head sliding above. The integral head of stud 1li passes into a perforation ma es it possible to have a strong spring without subjecting the Wood of the members to excessive strains. When the members are unfolded, the spring at each joint yields suiiiciently to allow the boss 9 to rise out of the recess 10, the head of the stud 14 sinking into the perforation in the member 2.

What I claim is- Y 1 A rule composed of folding sections having a joint for two sections comprising plates with interlocking boss and recess portions, a

plates and the sp1-in two. sections, the

' head part on one en and ing beyond theouter surfaces oi the sections when folded.

l l.TUSTUS A.. TRAUT.

Witnesses: f E. D. Casin? E. G. HOFFMAN.

In this way the members are slightly sepa-- .easily over the surface of the next memberin member 2 and has a bearing directly u on the shoulder 13 ofthe spring. This spring and a pivot-stud passing through th head Voithestud 'is preferably rounded off and 'I projects slightly labove'the surface of member The opposite end also .projects slightly.

a washer part at the other, one of said arts 

